Fire-box for boilers or furnaces.



WHO. @6%970. P'atnfed Feb. l2. |90I.

G. GHANTLEH. FIRE BOX FOB BOILERS 0R FURNACES.

(Application med nur. 24, 1900.) (No Modal.) 2 She'ots-Sheet I.

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lNo. 667,970. Patented Feb. I2, l90l. G. CHANTLEB.

FIRE BOX FOR BUILERS 0R FURPMCES.

(Applieatinn tiled Mar. 24, 1900.) .(No'lMudal.) 2 Sheets-Sheet 2.

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li'llFllmBUl( FR BOWERS GR FURNACES.

forming part of Letters Patent No. 667,970, dated February 12, 1901.

lamination tiled March 24, 1900 Serial No. 10,022. (No modell) lle itknown that l, GEORGE GHANTLER, a citizen of the United States, and aresident. of `Chicago, in the county of Cook and State of illinois, haveinvented a new and useful lmprovement in Fire'loxes for Boilers orFurnaces, of which the followingis a full, clear, and exact description.

(lne object of this invention is to provide a perfect consumption ol'coal and to retain the coal at a point near the front of the furnace orboiler until the maximum heating capacity of the coal has been exhaustedand freely supply air to this mass of coal in such manner that thecurrents of air will produce the best possible results.

Another purpose of the invention is to provide an inclined support forthe bed of coal and means whereby after the initial burning of the coalthe resultant coke will pass down to the lower point of the inclinedsupport and be supplied with oxygen to such an extent that all theheating' qualities of this second mass will be elfectually obtainedtherefrom.

A third purpose of the invention is toprovide a means for the convenientpassage of the cinders and ashes from the mass of fuel and for theconvenient disposition of such prod nets,

Another purpose of the invention is to provide means whereby the Wastegases resultant from combustion-as, for example, dioxid-Will beconducted from the lire-box to a point belon7 the support for the fueland out through and beyond the structure.

Another purpose of the invention is to provide a support for thematerial to be consumed, so constructed that the said support willcont-ain water, thus promoting the lifetime of the support for the fuel.

The invention consists in the'novel construction and combination of theseveral parts, as Will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, fo rminpa part ofthis specification, in which similar characters of reference indicatecorrespondine,` parts in all the figures.

Figure 1 is a longitudinal vertical section through a portion of aboiler and the improved lire-box applied thereto, the section beingg`taken practically on the line 1 1 of Fig. 2.

Fig. 2 is a vertical section taken practically on the line 2 2 of Fig.1, and Fier. 3 is a horizontal section taken substantially on the line 33 of Fig. 1.

A represents a boiler having a suitable mount; B, the iire box or potfor the boiler; C, the rear Wall of the fire-box; D, the bottom of thelire-box, and E the ashspit thereof. The support 1i), upon which thefuel is to rest, is inclined and extends as an imperforate partitionfrom the front upper portion of the firebox B to a point near the rear,the rear end of said fuel-support 10 havingr a bearing on the bottom Dof the fire-box. 'lhis fuel-sup port 10 is tubular or hollow, so that acentral chamber 1l is obtained, which is adapted to be filled withWater, and under such a construction the fuel-snpliort l0 is preventedfrom wearing out as quickly as if it were of solid construction, sincethe Water serves in a measure to chill the outer faces of the snpport.

A longitudinal chamber l5 is formed at each side of the fuel-support 10,and the said chamber extends any suitable distance beyond the saidfuel-support, and the outer Wall of the boiler-mount serves as the outerwall for the chambers 15, while the inner Wall of these chambersconsists of inclined cheekpieces 13, which extend from an air-opening 14in the front of the fire-box to a point near its center, the lowerportions of the cheekpieces 13 being at the front, and the air-inletopening 14 of the f1rebox is never closed, so that air Will constantlyenter said tirebox. The rear portion of the inner walls of the chambers15 is formed by uprights 12, which may be of brick or of other material,and the rear ends of these inner Walls 12 are given an inclination indirection of the outer Walls, as illustrated at 12b in Figs. land 3.Side plates 17 are usually erected at each side por* tion of thefuel-support 10, extending upward therefrom and forming guides for thefuel, and between the front and rear portions of the lire pot or box atransverse bridge or barrier 12 is constructed, extending,` from theinner Wall of one chamber 15 to the corresponding Wall of the opposing,rchamber. The bottom of this bridge or barrier 12 is arched or recessed,so as to provide a means for the fuel to pass beneath it in limitedquantities,

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as the bulk of the fuel is adapted to lie in front of the bridge orbarrier 12 and be supported thereby. A second and double bridge orbarrier 1.6 is located at the rear of thefront.

or single bridge or barrier 12. This double bridge or barrier issubstantially U-.shaped in cross-section and its side members land 16bare usually concaved at their bottom surfaces. The double bridge or.barrier 16 extends from one chamber 15 to the other and the spacebetween the members of the double bridge or barrier is in communicationwithy islocated in the ash-pot E. Ordinarily thev upper face of the.fuel-support 10 has longitudinal ribs l0a made thereon, so as to dividethe mass of fuel held on the support, and also in order that the body offuel may be shifted on its supportI 10 bars 21 are held to slidelongitudinally upon the upper face of the sup-A port, as illustrated inFigs. 2rand 3, and the handles of these bars extend out at the frontportion of the fire box or pot.

Invoperation `the air enters the fire Abox or pot in volume at theopening 14, and consequently vconstantly supplies oxygen tothe mass offuel at the front of the fire-box and in front of the single bridge 12.The fuel vis not entirely consumed atthe front ofthe fire-l Abox, andthe partial/ly consumed vmaterial slides down on the support 10, beneaththe double bridge 16, and receivesa fresh supply of oxygen by means ofair entering the chainbers 15 through thefront opening 14- in therre-box and passing into the space between the lower members ofthe doublebridge. This fresh su pplyof oxygen greatly facilitatescolnbustion; andit has been found in practice that the fuel is thus reduced to tinecinders and ashes. These cinders and ashes gradually nd their way to theoutlet-opening 18.`y

The dioxid finds its Way to the rear portion ofthe dre-box, falling tothe bottom thereof, and passes forward through openings or iues 2.2 tothe forward portion of the fire-box beneath the fuel-support 10 and thenenters an off-take pipe 23 leading outside of the furnace structure,Which pipe may be and pref-' erably is provided with partitions r24.(Shown in Fig. 1.)

I desire it to be understood that the im-vv proved re box or potmay beused in connection with stoves, ranges, or any article in Which coal isburned.

4Having thus described my invention, I claim as new and desire Vtosecure by Letters Patentfuel-stirring bars 21 arranged thereon, a hori-Zontal bottom D supporting the rear end of the fuel-support and providedwith opening 18 atits back end, a closing-slide 19 arranged below saidopening and having a rod extending to the front, a pendent fuel-abutmentarranged above the fuel-support, and an aircharnber arranged behind thefuel-abutment substantially as and for the purpose described.

2. A re-box comprising an imperforatc fuel-support 10 inclined with itsfront end the highest and made with a water-space, a horizontal bottom Dsustaining the rear end of the fuel-support and having an opening 18beyond the same, fuel-retarding devices arranged above the support, anair-chamber arranged behind the fuel-retarding devices, v

and air-channels arranged on each side of the .fuel-support andcommunicating at the rear end with the bottom of the fire-chamber and atthe front end with the space between fuelsupport 10 and bottom Dsubstantially as described.

3. A fire-box comprising an imperforate .fuel-support 10 inclined withits front end ,the highest and made with a Water-space, A.bars 21arranged thereon, a horizontal bot- .tom D having an opening 18 Vat itsrear end and an ash-pit below said bottom, an outletpipe 22, 23,arranged in said ash-pit and opening into the space beneath the inclinedfuelsupport, a slide with rod extending to the front, channels beingformed on each side of tthe fuel-support placingthe fire-chamber and.the space below fuel-support into communi- Tcation, and fuel-retardingdevices and airsupplying devices arranged above the inclinedfuel-supportsubstantially as described. 11. A fire-box having an inletfor fresh air v at its upper front end and an inclined fuel- Asupportydescending from said fresh-air inlet,

GEORGE CHANTLER.

Witnesses:

J. FRED. AoKER, JNO. M. RITTER.

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